Coating composition



Patented @ct. I7, 1922.

UNITED STATES ALLEN BICKLEY, OF SANDUSKY, OHIO.

COATING- COMPOSITION.

No Drawing.

To all whom. it may concern Be it known that I. ALLEN BICKLEY, a citizen of the United States, residing at Sandusky, in the county of Erie and State of Ohio, have invented certain new and useful Improvements in Coating Compositions, of which the following is a specification.

This invention relates to coating co1npositions, and it comprises a composition used in coating steel, or other materials, prior to hardening, to protect the metal during the hardening process.

In hardening steel, it is the usual practice to coat it with lead, or similar material eapable of standing a high degree of heat without cracking or scaling. During the heating step of the hardening operation, this coating protects the metal and prevents the outer surface from burning.

The use of lead for coating metals in hardening is very expensive, due to the high cost of material and the labor involved in applying it to the surface of the metals.

In the present invention, I have provided a composition which may be employed for coating metals in place of lead and which possesses all of the advantages to-be gained from the use of lead. The material is much cheaper to manufacture, and may be more easily applied.

In preparing the composition. I use fireclay, or other argillaceous material, dry silica, a substantially light fibrous material, and a solution of a silicate sufficient to produce a mixture having the consistency of ordinary molasses. The composition is applied to steel or other metal before hardening, in any suitable manner, as by dipping.

or applying with a brush, and it protects the metal during the hardening operation. I lg ye found that a mixture of the above ingredients in the proper proportion will stand a temperature of 3700 F., Without cracking or scaling.

In a typical embodiment of the invention, I employ 1 part of fire-clay, or other similar material, 1 part of a suitable light fibrous material. I have found that the material sold under the name of Cil-o-cel is very suitable or this purpose, but any other light fibrous material may be employed in place of this particular fibrous substance. I also emplo substantially 1"'part of 98 percent dry si ica, and substantially 3 parts of silicate of soda solution. The proportion of the Application filed December 28, 1920. Serial No. 433,666.

latter ingredient will vary according to the nature of the other ingredients. Sufficient silicate of soda solution is employed to produce a mixture having the consistency of molasses.

The solid ingredients are pulverized or disintegrated and thoroughly mixed either before or after being added to the solution. The silicate of soda solution may be added in any suitable manner, and stirred or agitated until the ingredients are thoroughly mixed.

When the composition has been suitably prepared, it is applied to the surface of steel, or other metal, in a manner similar to the application of paint or other coating compositions. prior to hardening, and it protects the surface of the steel during the hardening process.

The use of a solution of silicate of soda is advantageous and I prefer to employ a solution havin a 'ravit of 403 Baum.

However, solutions of silicate of soda of other strengths may be employed, and other soluble silicates may be used in place of silicate of soda.

\Vhile I have described in detail the preferred practice of my process, it is to be understood that the details of procedure and proportion of ingredients may be widely varied, and that known chemical equivalents may be employed in place .of the materials mentioned, without departing from the spirit of the invention or the scope of the subjoined claims.

Having thus described my invention, I claim:

1. The herein described composition of matter, comprising a mixture of substantially 1 part ofl fire-clay. 1 part of lightfibrous material, 1 part of dry silica, and 3 parts of a solution of silicate.

2. The herein described composition of matter, comprising a mixture of substantially equal parts of fire-clay, light fibrous material and silica, and a solution of a silicate in sufficient quantity to produce a semisolid mixture.

In testimony whereof I aflix my signature in presence of two Witnesses.

ALLEE BICKLEY.

Witnesses CARL Emma Anna A. ms. 

